ELECTRONIC COMPONENT

• US 20160233845A1
• Filed: 04/21/2016
• Published: 08/11/2016
• Est. Priority Date: 10/30/2013
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: ISOSHIMA, Tomoshiro, MASUDA, Hiroshi
• Granted Patent: US 9,787,276 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01F 17/00 Fixed inductances of the signal type coils in general H01F5/00; inductors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof and multistep manufacturing processes therefor H01L28/10
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 2017/0026 Multilayer LC-filter
• CPC Class Codes: H01F 27/00 Details of transformers or inductances, in general
• CPC Class Codes: H01F 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• CPC Class Codes: H01G 4/40 Structural combinations of fixed capacitors with other electric elements, the structure mainly consisting of a capacitor, e.g. RC combinations
• CPC Class Codes: H03H 2001/0085 Multilayer, e.g. LTCC, HTCC, green sheets inside PCB filters H05K
• CPC Class Codes: H03H 7/0115 comprising only inductors and capacitors H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence
• CPC Class Codes: H03H 7/09 Filters comprising mutual inductance
• CPC Class Codes: H03H 7/1725 Element to ground being common to different shunt paths, i.e. Y-structure

Abstract

An electronic component includes a device body and first through n-th LC parallel resonators connected in series with each other. The first through n-th LC parallel resonators respectively include first through n-th inductors and first through n-th capacitors. The first through n-th inductors are disposed in a first direction in the device body in this order. The first and n-th inductors are provided with a spiral shape or a helical shape such that they turn around respective winding axes extending along a second direction which is perpendicular or substantially perpendicular or substantially perpendicular or substantially perpendicular to the first direction. At least one of the second through (n−1)-th inductors is provided with a helical shape such that it turns around a winding axis extending along the first direction.

Claims

1. An electronic component comprising:

a device body; and

first through n-th LC parallel resonators connected in series with each other where n is an integer of three or more;

wherein

the first through n-th LC parallel resonators respectively include first through n-th inductors and first through n-th capacitors;

the first through n-th inductors are disposed in the device body such that the first through n-th inductors are arranged in a first direction in order from the first inductor to the n-th inductor;

the first and n-th inductors are provided with a spiral shape or a helical shape such that the first and n-th inductors turn around respective winding axes extending along a second direction which is perpendicular or substantially perpendicular to the first direction; and

at least one of the second through (n−

1)-th inductors is provided with a helical shape such that the at least one of the second through (n−

1)-th inductors turns around a winding axis extending along the first direction.

2. The electronic component according to claim 1, wherein n is three.

3. The electronic component according to claim 2, wherein a resonant frequency of the second LC parallel resonator is lower than a resonant frequency of the first LC parallel resonator and a resonant frequency of the third LC parallel resonator.

4. The electronic component according to claim 2, further comprising:

an input terminal that is disposed on a surface of the device body and that is connected to the first LC parallel resonator;

an output terminal that is disposed on a surface of the device body and that is connected to the third LC parallel resonator;

a ground terminal disposed on a surface of the device body; and

a capacitor disposed between a node between the input terminal and the first LC parallel resonator and the ground terminal, between a node between the first and second LC parallel resonators and the ground terminal, between a node between the second and third LC parallel resonators and the ground terminal, or between a node between the third LC parallel resonator and the output terminal and the ground terminal.

5. The electronic component according to claim 4, wherein

the device body includes a plurality of insulating layers stacked on each other in the second direction;

and

the first through third LC parallel resonators include inner conductors disposed on the corresponding insulating layers and interlayer connecting conductors which pass through the corresponding insulating layers in the second direction.

6. The electronic component according to claim 5, wherein

the capacitor is disposed between the node between the first and second LC parallel resonators and the ground terminal;

and

the electronic component further includes;

a first interlayer connecting conductor that connects the first and second inductors in series with each other; and

a second interlayer connecting conductor that connects the second inductor and the capacitor.

7. The electronic component according to claim 5, wherein

the capacitor is disposed between the node between the first and second LC parallel resonators and the ground terminal;

and

the electronic component further includes;

a third interlayer connecting conductor that electrically connects the first inductor and the capacitor; and

a fourth interlayer connecting conductor that electrically connects the second inductor and the capacitor.

8. The electronic component according to claim 5, wherein at least one of the first through third inductors is defined by a plurality of inner conductors connected in parallel with each other.

9. The electronic component according to claim 5, wherein

the second inductor includes:

a plurality of first inductor conductors that are disposed on the corresponding insulating layers and that are arranged in parallel or substantially in parallel with each other in the first direction;

a plurality of second inductor conductors that are disposed on the corresponding insulating layer positioned farther toward one side of the second direction than the plurality of first inductor conductors and that are arranged in parallel with each other in the first direction, one end portion of the corresponding second inductor conductor being superposed on one end portion of the corresponding first inductor conductor located on one side of the first direction, as viewed from a plane in the second direction, and the other end portion of the corresponding second inductor conductor being superposed on the other end portion of the corresponding first inductor conductor located on the other side of the first direction, as viewed from a plane in the second direction;

a plurality of fifth interlayer connecting conductors that each connect one end portion of the corresponding first inductor conductor and one end portion of the corresponding second inductor conductor; and

a plurality of sixth interlayer connecting conductors that each connect the other end portion of the corresponding first inductor conductor and the other end portion of the corresponding second inductor conductor; and

the plurality of first inductor conductors are distributed among a plurality of the insulating layers.

10. The electronic component according to claim 2, wherein the first and third inductors are provided with a helical shape.

11. The electronic component according to claim 2, wherein the first and third inductors are provided with a spiral shape.

12. The electronic component according to claim 1, wherein n is four or more.

13. The electronic component according to claim 1, wherein resonant frequencies of the second through (n−

1)-th LC parallel resonators are lower than a resonant frequency of the first LC parallel resonator and a resonant frequency of the n-th LC parallel resonator.

14. The electronic component according to claim 1, wherein at least one of the first through n-th inductors has a diameter that changes along a length thereof.

15. The electronic component according to claim 1, wherein the first direction is a top-bottom direction.

16. The electronic component according to claim 15, wherein the winding axes are displaced from the top-bottom direction.

17. The electronic component according to claim 1, wherein current flows through at least one of the first through n-th inductors in a direction that is different from a current that flows through at least another of the first through n-th inductors.

18. The electronic component according to claim 1, wherein the electronic component is a low pass filter.